C8051F585-IQ

Overview

The C8051F585-IQ is an automotive-qualified, mixed-signal ISP Flash microcontroller from Silicon Labs. It features a high-speed 8051 core operating at up to 50 MHz with pipelined architecture. The device integrates 128 kB of banked Flash memory and 8448 bytes of internal data RAM. Key peripherals include a 12-bit ADC supporting up to 32 external inputs, three comparators, CAN 2.0 and LIN 2.1 controllers, two UARTs, SMBus, and SPI. It operates on a supply voltage of 1.8 V to 5.25 V and supports temperatures from -40 °C to +125 °C in a 48-pin QFP/QFN package.

Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 standards for robust industrial and vehicle applications.
• Integrated CAN 2.0 and LIN 2.1 controllers enabling direct network communication without external transceivers or crystals.
• On-chip debug circuitry providing full-speed, non-intrusive in-system debugging capabilities.
• High-performance 8051 core executing most instructions in one or two system clocks for efficient processing.

Applications

• Motor control systems
• Sensor interface modules
• Parking assistance units
• Seat position and adjustment controllers

Procurement Notes

Verify component authenticity through authorized distributors. Confirm the specific ordering suffix matches the required package variant. Check current lifecycle status as this family may be subject to end-of-life notices. Ensure environmental compliance documentation aligns with project requirements before finalizing procurement orders.

Selection Notes

Select this model when automotive reliability and integrated bus controllers are required. Verify that the 48-pin package fits the PCB layout constraints. Compare memory sizes against other variants in the F58x series if code space differs. Ensure the 1.8 V to 5.25 V supply range matches the target system power design.

Part Context

This component belongs to the C8051F58x/F59x Mixed Signal ISP Flash MCU Family. It shares architectural similarities with other members like the C8051F580 and C8051F587 but offers specific memory and pin configurations tailored for complex embedded tasks requiring multiple communication interfaces.

Replacement Considerations

EFM8BB31F64I-D-QFN32R

FAQ

Does the C8051F585-IQ require an external crystal for CAN operation?

No, the device includes an internal oscillator accurate enough for CAN and master LIN operation, eliminating the need for an external crystal.

What is the maximum number of external analog inputs supported by the ADC?

The 12-bit ADC supports up to 32 external single-ended inputs via its analog multiplexer.